Recap

At the Radin Building, owner and multi-millionnaire Paul Radin descends an elevator into an underground shelter where two workmen are completing installation of a sound and projection system. Radin brings up an image of the city and then a nuclear bomb exploding. Radin notes to the worker that the shelter is authentic but he plans to use it for a practical joke of sorts on three friends that are coming to visit. The workman is astonished that Radin would pull such an expensive prank on his friends, and Radin notes that they are very special friends indeed...